<?php
namespace FluidTYPO3\Vhs\ViewHelpers\Security;

/***************************************************************
*  Copyright notice
*
*  (c) 2014 Claus Due <claus@namelesscoder.net>
*
*  All rights reserved
*
*  This script is part of the TYPO3 project. The TYPO3 project is
*  free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  The GNU General Public License can be found at
*  http://www.gnu.org/copyleft/gpl.html.
*
*  This script is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*
*  This copyright notice MUST APPEAR in all copies of the script!
***************************************************************/

/**
 * ### Security: Deny
 *
 * Denies access to the child content based on given arguments.
 * The ViewHelper is a condition based ViewHelper which means it
 * supports the `f:then` and `f:else` child nodes.
 *
 * Is the mirror opposite of `v:security.allow`.
 *
 * @author Claus Due
 * @package Vhs
 * @subpackage ViewHelpers\Security
 */
use TYPO3\CMS\Fluid\Core\ViewHelper\Facets\ChildNodeAccessInterface;

class DenyViewHelper extends AbstractSecurityViewHelper implements ChildNodeAccessInterface {

	/**
	 * Render deny - i.e. render "else" child only if arguments are satisfied,
	 * resulting in an inverse match.
	 *
	 * @return string
	 */
	public function render() {
		$evaluation = $this->evaluateArguments();
		if (FALSE === $evaluation) {
			return $this->renderThenChild();
		} else {
			return $this->renderElseChild();
		}
	}

}
